US2296493A - Stapling machine - Google Patents

Description

sePt- 22, 1942 s. s. BERNSTEIN STAPLING MACHINE' Filed Nov. 15, 19:59

sept. 22, 1942. s; s. BERNSEIN STAPLING MAcHlNE Filed Nov. 15, 1939 2 Sheets-Sheet -2 "NAN www4-MBH ff 3 Patented Sept. 22, 1942 STAPLING MACHINE Samuel S. Bernstein, Los Angeles, Calif., assignor to B. and F. Corporation, a corporation of California Application November 15, 1939, Serial No. 304,634

8 Claims.

This invention relates generally to devices for inserting or installing staples or fasteners. More particularly the invention relates to devices for inserting or installing fastening means of the type shown and described in my co-pending -application for patent, Serial No. 177,551, led December 1, 1937, Letters Patent No. 2,180,500, of which this application is a continuation in part, and in Letters Patent No. 2,232,994.

It is a primary object of this invention to provide means for inserting or installing staples of the type described and shown in the above mentioned patents and other staples of a similar nature designed particularly for use in fastening coil springs to spring supporting fabrics or the like in upholstery construction. In this connection it is also an object of this invention to provide a device which is operative for the installation of fastener means wholly from one side of the sheet of material or the like to which the fastener is to be applied and which does not require any anvil or part of the device on the opposite side of said sheet even where the sheet is soft or flexible.

It is also an object of this invention to provide a device of the character indicated which is of simple construction and which is easy to operate.

It is a further object of this invention to provide as a part of the stapling device a feed mechanism for actuating staples from a magazine to a staple receiving part of the device. In this connection it is a particular object to provide a feed mechanism which is operatively associated with the staple driving or inserting mechanism so that the feed mechanism has a delayed or timed action or movement relative to said staple driving mechanism in order to accomplish the feeding of the staples at the desired time.

These and other objects will be apparent from the drawings and the following description thereof. Referring to the drawings which are for illustrative purposes only:

Fig. 1 is a front elevation of a form of stapling device embodying the invention;

Fig. 2 is a fragmentary sectional elevation slightly enlarged, of the device of Fig. 1, taken on line 2--2 of that figure showing the parts in retracted or normal position;

Fig. 3 is a view similar to Fig. 2 but showing the parts in extended or staple driving position;

Fig. 4 is a, cross section takenl on line 4-4 of Fig. 2;

Fig. 5 is an enlarged fragmentary sectional elevation on line 5-5 of Fig. 2 showing the driving element in a position intermediate that in which it is shown in Figs. 2 and 3;

Fig. 6 is a view similar to Fig. 5 but showing the driving element in extended position;

Fig. '7 is a view similar to Fig. 5 showing a modified form of driver element and staple receiving portion for use in connection with another form of staple;

Fig. 8 is a cross section of the form of device shown in Fig. 7. Part of the section is taken on line 8 8 of Fig. 7 and the remainder is taken as of line 4 4 of Fig. 2 showing a modified magazine;

Fig. 9 is a view similar to Fig. 7 showing the device of Fig. 7 in extended or staple driving position; and

Fig. 10 is a perspective view of the staple shown in Figs. 7 and 9.

More particularly describing the invention in Figs. 1 to 6 there is shown a form of stapling device which is designed to operate or insert the staples by driving the staples from above at approximately the center of the staple to cause the staple to bend back upon itself. This form of the invention is designed for driving or inserting staples of the type shown and described in my Patent No. 2,180,500 hereinabove referred to.

Referring to Figs. 1 to 6 the stapling device comprises a frame 50 which is generally U- shaped in cross section as indicated in Fig. 4. Adapted to be mounted on this frame is a magazine 5|. Any suitable means may be provided for attaching the magazine toy the frame 50 such, for instance, as the screws 52 shown in Fig. 1. The magazine element 5I is adapted to fit inside of the open side of the U-shaped frame 50 as indicated in Fig. 4, the screws 52 passing through suitable holes in the frame 5l) and being secured to a part or parts of the magazine element 5|.

Mounted inside of the frame 56 near the lower end thereof, is what will be termed a bearing block 54 which is centrally apertured at 55 to slidably accommodate a driver element or drive bar 55 extending longitudinally of the frame. The drive bar 56 is adapted to be actuated by means of a handle 57 which is pivotally mounted at 58 on an extended plate portion 59 mounted on the frame 50. The inner end of handle 51 abuts against the upper end of the driver bar 56 at 6D and when operated forces the driver bar downwardly against the action of a spring 62 which is interposed between the bearing block 54 and a shoulder 63 on the member 56. The driver bar 56 might be made of the same diameter throughout in which case a pin or other means could be used for holding the spring in place of shoulder 63.

The lower end of the bearing plate is slotted v at 64 to accommodate a drive plate 65 mounted 5 in the bar 56 and adapted to drive the staples into place.

The outer'or lower end of the bearing block 54 terminates? in ahead '61 which is provided with a staple receiving recess 68. An opening 69 ex-A l0 tends from front to rear of the head and cornmunicates with the recess. The slot and recess.` construction forms supporting ledges 'l0-uponwhich a staple 26 may rest. The prong portions of the staple extend throughth'e'foneningf BSL-as 1'5 illustrated in Fig. 5.

The head 61 is provided with projections 'l2 which are adapted to act asa guideinpositioning the device on a spring supporting fabric or the like.

Communicating with the staple. receiving re-A cess 68'is a guid or trackway 13"which forms an extension of the magazine l'. The trackway is formed by, an extension^ of the inner wall of" the magazine -bentback ,upon itself Ialong its side margins at 115 tofonm guide channels to accommodate the side edge portions of thestaples 26. The prongs of the staples extend. through the slot 16. The magazine itself comprises a tubular member substantially rectangular in cross section as shown '30 in Eig. 4.

In. order tdprovide for feeding-.the staples into the staple receiving recess 68iwhere they maybe acted. upon by-.fthe-driver Vbar 56, astaple feeding mechanism is provided which is-ldesigned to loe operated by'movement ofthe driver bar 56'. This mechanism comprises. av feed bar 18 which bears against a bearing plate 19 mounted on the inner side. of the 'feedV magazine.r The feed. 'bar' also bearsY againstthe bearing-.block 64. The bar 18 40 is .provided/.Witha rack-'.80'.v and.Y the driver bar- 5a h islprovidedhwith afcorresponding. rack BI. Interposedbetween these'racksis.. a rotatable pinion4 82. mounted upon-shaftt'- which is journaled in the-.framelin any suitable manner.

At'. theendroithe Vfeedbar thereis provided a slot4 8 5-V which Ais adapted to Y slidably-accommodate a finger supporting member 86'. The nger sup.- porting member isA secured in the feedy bar by means of..a. pin-.81? lwhich extends through the 5o.

slotted portion of the member T8'. Themember 8 6-is-.providedwithalongitudinalslot 88 to slidably, accommodate the. pin 81and thereby permit. limited. movement of. the fingerV supporting member 86relative to the feedbar 18..

Mounted onmember 'isaspring` finger 89 whicnextends through a. slot 9|)` inthe trackway 13v and-is adapted to engage the individual staples.n A second spring finger. 89a is. iixedly mounted on themagazine 5l to prevent movement of the staples back away from the head 61. The outer endsofY the fingers are beveled ascshown` in Figs. 1 andi2v topermit movement of staples-toward-the headbut rnot away from it.

In operation, hand1e-5l is moved toward the 65- magazine memberrl thereby. fr-cingthe driver element or bar 56Y downwardly. against a staple as shown in Fig. 5. In thisparticular form of the invention the drive plate. is provided with a cut-out portion 65 so that when theelement 70.

is driven to the position in-which it is shown in Fig. 6 it will straddle awire 44vvhich `may be considered as being the-lower coil of a spring. which it is rdesiredtofasten toa spring supporting fabric 43.- Movement of the.v handle forces-.75Y

the drive bar against the staple and causes the staple to bend upon itself as illustrated in Fig. 6 until the bar reaches its extended position shown therein. During this movement the feed bar 18 is driven in an opposite direction to the movement of the bar 56 thereby moving with it the finger supporting element 86. However, the finger 89 by reason of the slot 88 in the element 86 is not' immediately retracted. After pressure on the handle is released and the-spring 62 forces the driver bar back to its normal position, the

finger supporting element 86 is then in the posi-tioninr which it is shown in Fig. 3 and upon return movement of the feed bar 18 the finger ismcauseclr to move-downwardly due to the slot 88. The finger' doesnot' immediately begin its return movement however due to the pin and slot construction. Thus, before the finger has an opportunity to move the next succeeding staple down- Wardlly and to 'force the staples ahead of it toward the head 61, the drive plate-65 is retracted out ofthe region of' the stapleV receivingv recess, 68. thereby` permitting the feeding of. another staple. into position.

In Figs. 78and 9 there is shown another form`V of 'driver bar and headelementl for inserting orr operating another formof'staple shown in Fig. 10 which isY described and claimed in my above, referred to Patent No. 2,232,994'. The staplehere desired to be operated is generally indicated by reference numeral 90` and'comprises an upwardly, bowed or rounded portion 9|', laterally extending.V wing portions 92'andltwo sets offofpposed prongs4 93. Preferably the staple is formed from a single piece of metal.

In this form of the invention the bearing .block indicated by reference numeral 9.5 is providedl with asquare hole 961 to slidably accommodate a. drive bar 91 which is square in cross section. The lower end' of the drive bar is provided with ay pair of drive plates 98 which are adapted to contact and bear against the staple at each side ofA the rounded portion as shown in Fig. 'TWhere the lbar is shown intermediate its retracted and eX- tended positions. The bearing block 95v is -provided with a head. |00; which has a staple receivingv recess IGT. An opening H12V extends `from front to rearof the head. This construction-provides supporting ledges l03up'on which the staplev is supported. When the' driving, element 91 is forced downwardly it bends the staple, forcing, it through the opening l2'as indicatedin Fig. 9' until the staple is Vin the holdingyposition over the lower coil 411 of a spring in position on the fabric 113..v

Since the use olffa square Ldriver barleavesonly` limited'space for a. compression spring above-the bearing block and. since a round.' spring. must-lb'e. considerably larger' than the bary itl may -b'e desirable to employ a tension spring. las shown. in brokenglines in Fig. 2`to yieldably h'old" the b'ar against' movement inthis'formpf the'inverrtionin place of the compression" springg" for"- merly described.

The cross-sectional shape-A of themagazine is-L preferably alteredto accommodate staples of; the

type-:shownin-Fi'g. 10 lby the` additionl ofiguiolefl of Fig. is preferred for the reason that with the wing portions downwardly angled a greater upward turn of the prongs is achieved .when the staple is bent as in Fig. 9. Thus when the staple of Fig. 10 is Ideformed the prong portions take an extreme turn upwardly and penetrate in the fabric surface leaving no sharp points beneath the fabric.

Although the invention has been shown and -described with reference to particular types of staples it is contemplated that the stapling mechanism with slight alterations would be suitable for use with other types of staples and the invention includes such changes as come within the scope of the claims.

I claim as my invention:

1. A stapling device comprising a frame; a bearing block and head means mounted in said frame; a staple driver bar slidably mounted in said block and head means; a handle operatively associated with said bar; means for yieldably holding said bar against movement; and means 'formed in said stationary combined bearing block and head means for receiving and supporting a staple in the region of the path of movement of said bar.

2. A stapling device comprising a frame; a stationary combined bearing block and head means mounted in said frame; a staple driver abar slidably mounted in said frame and movable through said bearing block and head means; a handle operatively associated with said bar; means for yieldably holding said bar against movement; means formed in said bearing block and head means for receiving and supporting a staple in the region o-f the path of movement of said bar; magazine means mounted on Said frame and communicating with said staple receiving and supporting means; and staple feed means operatively associated with said bar for moving staples from said magazine means into said staple receiving means upon operation of said handle and bar.

3. A stapling device comprising a frame; a driver bar slidably mounted for longitudinal movement in said frame, said bar being provided with rack teeth; staple receiving means for receiving and holding a staple in the path of movement of said driver bar; magazine means connected to said staple receiving means; a feed bar having rack teeth thereon and being slidably mounted in said frame; a pinion interposed between and operatively engaging said driver bar and said feed bar; a finger mounted in the end of said feed bar and extending into the :path of staples in said magazine, said nger being slidably mounted in said feed bar to permit limited movement of said feed lbar independent of Said nger.

4. A stapling device comprising a frame; a bearing block mounted in said frame; a driver bar slidably mounted in said block; a handle pivotally mounted on said frame and operatively associated with said bar; said bearing block being provided with staple receiving means for holding a staple in the path of movement of said bar; a feed .bar halving rack teeth thereon and being slidably mounted in said frame; a pinion interposed between and operatively engaging said driver bar and said feed bar; a linger mounted in the end of said feed bar and extending into the path of staples in said magazine, said finger being slidably mounted in said feed bar to permit limited movement of said feed lbar independent of said finger.

5. A stapling device comprising a frame; a

driver bar slidably mounted for longitudinal movement in said `frame, said bar being provided with rack teeth; staple receiving means for receiving and supporting a staple in the path of movement of said driver bar; magazine means connected to said staple receiving means; a feed means slidably mounted in said frame having a portion lprovided. with rack teeth thereon; a pinion interposed between and operatively engaging said driver bar and said portion of said feed means having the rack teeth; said feed means having a portion extending into the path of staples in said magazine.

6. A stapling device comprising an elongate frame; an elongate staple driver bar slidably mounted in said frame; stationary means in said frame for receiving and supporting a staple to be driven, said means being located on opposite sides of the path of movement of said bar, whereby a staple is supported in the path of movement of said driver bar; yieldable means for holding said driver bar with the staple driving end of said bar spaced from the region of said staple receiving and supporting means; means forming an elongate staple magazine extending substantially parallel to Said driver bar, said magazine terminating in a curved portion extending from and connecting the major extension of said magazine to said staple receiving and supporting means; and a handle 4lever lpivotally mounted on said |frame and adapted to engage the other end of said driver bar for operating the same.

7. In a stapling device, a frame; a staple driver bar slidably mounted in said frame; a lever for operating said 1bar; a head rigidly mounted in said frame at one end thereof, said head being slotted at its outer end and having a pair of oppositely disposed gui-de recesses spaced inwardly of the outer end forming an internal lateral enlargement of said slot adapted to suplport a staple having laterally extending portions thereon in the path of movement of said bar, said recesses extending at right angles to the longitudinal axis of said bar; and yieldable means for holding said bar spaced away from the region of said recesses in said head; said bar being movable through the slotted end of said head to a position Where it extends beyond the frame and head.

8. In a stapling device, a frame; a staple driver .bar slidably mounted in said frame; means lfor operating' said bar; a head integral with said frame at one end thereof; said head being slotted at its outer end and having a pair of o-ppositely disposed guiderecesses spaced inwardly orf the outer end forming an internal lateral enlargement of said slot adapted to support a staple having laterally extending portions thereon in the path of movement of said bar, said recesses extending at right angles to the longitudinal axis of said bar; said bar having a pair of laterally spaced parallel drive plates at its staple driving and extending beyond the main portion of the bar a limited distance, said bar being so positioned with relation to said head that said plates are in parallel planes adjacent said recesses and at right angles to the direction of lateral extension of said recesses from the longitudinal axis of said bar; and yieldable means for holding said lbar spaced away from the region of said recesses in said head, said bar being movable through the slotted end of said head to a position where it extends beyond the frame and head.

SAMUEL S. BERNSTEIN.

Images